On 11.10.2018 14:53, Kamil Jońca wrote:

Is it possible, that dovecot-lmtp, has in inserted "Received:" header something about its version ie. instead: --8<---------------cut here---------------start------------->8--- Received: from alfa.kjonca by alfa.kjonca with LMTP id n1O7D5Q3v1toSQAApvcrCQ (envelope-from <envelope@from>) for <kjonca@localhost>; Thu, 11 Oct 2018 13:44:20 +0200 --8<---------------cut here---------------end--------------->8---

would be: --8<---------------cut here---------------start------------->8--- Received: from alfa.kjonca (Dovecot version) by alfa.kjonca with LMTP id n1O7D5Q3v1toSQAApvcrCQ (envelope-from <envelope@from>) for <kjonca@localhost>; Thu, 11 Oct 2018 13:44:20 +0200 --8<---------------cut here---------------end--------------->8---

Hello

Even mentioning Dovecot in the Received header was intentionally removed in v2.2.31 with the following comment:

v2.2.31 2017-06-26 Timo Sirainen <tss@iki.fi>

    * LMTP: Removed "(Dovecot)" from added Received headers. Some
      installations want to hide it, and there's not really any good reason
      for anyone to have it.

In case you have a good reason for this request, we are eager to hear it and we will consider it. br, Teemu